You've been together 2 years and you think its the right time for marriage?! Shit man... Shit.... I have friends the same age that have been together 3 or 4 years, then they break up over something stupid. Thats when happens when you're this age. I hope you're having a long engagement. I couldn't imagine getting married this young. Earliest would be once both of us are out of college and have been dating a few years and its for sure the right time.
You're still getting to know each other at 2 years. Hell at 18, almost 19 (Just saying that makes you seem young), you don't even know yourself fully!